不规则棒形构件径向惯性矩的测定——能量法

The General Bifilar Torsion Pendulum of Measuring Radial Moment of Inertia for Irregular Stick Shaped Bodies-Method of Energy

本文介绍了一般双线摆的结构原理。根据能量法阐述了该摆微幅与大幅摆动周期的近似解法。同时还说明了该摆的某些特性和优点。用这种方法能够可靠地测量不规则棒件的惯性矩,并可以不采用卡具。当摆角(?)0<40°时,其测量准确度优于1％。

This paper describes the structure and principle of a bifilar torsion pendulum in its general (unsymmetrical) form. The approximate expressions of the oscillating period for small and large angle oscillations of the general bifilar torsion pendulum are derived according to the theory of energy. Some important oscillatingproperties and advantages are presented. The moment of small-sized irregular stick shaped objects around a radial axis can be measured reliably without any special fixture. When (?)0<40°, the uncertainty of measurement is better than 1%.